Active-passive combined heat preservation device for surface of mass concrete pouring bin

Abstract

The utility model discloses an active-passive combined heat preservation device for the surface of a mass concrete pouring bin, the upper side of a film is fixedly connected with first tarpaulin, the first tarpaulin is fixedly connected with a heat preservation layer, and the heat preservation layer is fixedly connected with a frame. The frame is provided with a plurality of stand columns, each stand column is fixedly connected with a transverse strip through a plurality of iron nails, and the transverse strips are fixedly connected with longitudinal strips through a plurality of iron nails. A plurality of first warm air blowers and second warm air blowers are fixedly arranged on the heat preservation layer, air outlets of the warm air blowers at four adjacent corners on the heat preservation layer are respectively and vertically arranged, and the air outlets of the plurality of second warm air blowers at the two sides of the middle part of the heat preservation layer are arranged along the wind flow according to the air outlets of the first warm air blowers. The film clings to the surface of the concrete; and the second tarpaulin covers the frame. The warm air blower can heat the concrete pouring bin surface, and the heat preservation efficiency of the concrete bin surface is improved; the tarpaulin covers the frame, heat loss of concrete can be reduced, wind and rain are prevented, and the frame, the tarpaulin and the heat preservation layer can be reused to reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to an active-passive combined heat preservation device for the surface of a large-volume concrete pouring silo, which is particularly suitable for concrete heat preservation during construction in low-temperature environments. Background Technology

[0002] When pouring large volumes of concrete during cold seasons, the hydration of cement releases heat, causing the internal temperature of the concrete to rise. Due to concrete's poor thermal conductivity, the surface temperature drops rapidly under the influence of low ambient temperatures, resulting in a significant temperature difference between the inside and outside. When this temperature difference exceeds permissible limits, it generates substantial tensile stress on the concrete surface, easily leading to cracking. Therefore, controlling the temperature difference between the inside and outside of the concrete during cold seasons is a crucial aspect of temperature control and crack prevention for large-volume concrete pours.

[0003] In order to control the temperature difference between the inside and outside of the concrete pouring chamber when pouring concrete in low-temperature seasons, insulation materials such as straw bags, insulation blankets, insulation polystyrene boards, and rubber and plastic sponges are commonly used for insulation.

[0004] Engineering practice shows that using straw bags and insulation blankets for insulation is susceptible to the effects of liquid water from newly poured concrete and rainfall, which can cause the straw bags and insulation blankets to become damp or wet, resulting in reduced or even lost insulation performance.

[0005] Whether using straw bags, insulating blankets, or insulating polystyrene boards and rubber-plastic foam, these are all passive insulation measures. If the insulation effect is not strong enough, the surface temperature of the pouring trough may still be low when encountering strong cold waves or sustained low temperatures, which will affect the cement hydration reaction rate of the concrete in the pouring trough, slow down the development of concrete performance, and thus increase the risk of concrete cracking.

[0006] In addition, the above-mentioned insulation measures are mainly for the surface insulation of the casting silo. Engineering practice shows that in the low-temperature season, if the wind speed on the silo surface is high, it is easy for the moisture on the surface of the casting silo to dissipate quickly, causing the surface to dry and shrink, which can easily lead to shrinkage cracks.

[0007] In summary, developing a thermal insulation measure for large-volume concrete structures that transforms passive insulation into active insulation, retains moisture while providing insulation, is easy to operate, and is reusable is of significant engineering importance. Utility Model Content

[0008] To address the aforementioned problems, this utility model provides an active-passive combined insulation device for the surface of a large-volume concrete pouring silo.

[0009] This utility model is achieved through the following technical solution:

[0010] An active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo includes a film, a first tarpaulin fixedly connected to the upper side of the film, an insulation layer fixedly connected to the first tarpaulin, and a frame fixedly connected to the insulation layer.

[0011] The frame is provided with multiple columns, each column is fixedly connected to a horizontal bar by several iron nails, and the horizontal bar is fixedly connected to a vertical bar by several iron nails.

[0012] Multiple first heaters and multiple second heaters are fixedly installed on the insulation layer. The air outlets of the first heaters at the four adjacent corners of the insulation layer are placed vertically, and the air outlets of the multiple second heaters on both sides of the middle of the insulation layer are set in the direction of the airflow according to the air outlet direction of the first heaters.

[0013] The frame is equipped with multiple first thermometers, which detect the air temperature inside the frame on one side of the insulation layer.

[0014] The bottom of the membrane is covered on sealed concrete, and multiple second thermometers are embedded in the concrete to detect the temperature inside the concrete.

[0015] The outer side of the frame is fixedly covered with a second tarpaulin.

[0016] The second tarpaulin is made of polyethylene and is used for waterproofing.

[0017] The frame is made of wood.

[0018] The bottom edge of the second tarpaulin is fixedly and sealed to the bottom edge of the first tarpaulin, and the second tarpaulin and the first tarpaulin form a closed space to prevent moisture from entering the insulation layer.

[0019] Preferably, after the first heater blows air out from the four adjacent corners of the insulation layer, it can form an airflow circulation inside the frame and evenly heat all parts inside the frame. The second heater enhances the even heating of the air in the middle part inside the frame.

[0020] Alternatively, the film can be applied tightly to the surface of the large-volume concrete pouring area to prevent moisture loss from the concrete surface. In winter, rapid moisture loss can affect the cement hydration reaction and consequently the strength gain of the concrete; this layer plays a crucial role in retaining moisture.

[0021] Alternatively, a first tarpaulin is placed over the film to prevent moisture from the concrete surface from wetting the insulation layer. During winter construction, condensation may occur on both the concrete and film surfaces; this layer effectively prevents the insulation layer from becoming damp and reducing its insulation performance.

[0022] Alternatively, an insulation layer may be placed above the first tarpaulin to insulate the concrete.

[0023] Alternatively, the heaters can be evenly installed above the insulation layer to heat the air inside the frame.

[0024] Alternatively, the frame includes uprights, horizontal bars, vertical bars, and nails, with the uprights, horizontal bars, and vertical bars fixedly connected by the nails. The frame is used to support the upper second tarpaulin.

[0025] As a further option, a second tarpaulin is placed over the frame to prevent the warm air blown out by the heater from escaping, and also to protect against wind and rain.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. This insulation measure effectively improves the insulation and moisture retention of large-volume concrete surfaces through the synergistic effect of multiple measures, including a thin film to prevent moisture loss from the concrete, a first and second tarpaulin to prevent the insulation layer from getting wet, insulation layer insulation, first and second heaters for heating, and an upper tarpaulin to prevent heat loss and wind protection. It also reduces temperature stress and surface shrinkage, prevents concrete cracks, and ensures the durability and safety of the concrete structure.

[0028] 2. This device and method are simple to operate and easy to implement. The steps are in a reasonable sequence. The materials used are all common building materials. It can be used for timely insulation treatment after the concrete is poured. Furthermore, each component can be reused, which improves construction efficiency and reduces construction costs. Attached Figure Description

[0029] Figure 1 This is a top view of the structure of the upper frame of the insulation layer, the first heater and the second heater in the insulation device of this utility model;

[0030] Figure 2 for Figure 1 A partial 3D schematic diagram of the connection structure between the columns, horizontal bars, vertical bars, and nails in the frame within the dotted circle.

[0031] Figure 3 yes Figure 1 A cross-sectional view at point A along the centerline.

[0032] Figure 4 This is a schematic diagram showing the installation of the air outlets of the first and second heaters of this utility model within the frame.

[0033] in, Figure 4 The dotted line indicates the direction of the air outlet of the first or second heater.

[0034] The markings in the diagram are: 1. Film 2. First tarpaulin 3. Insulation layer 4. First heater 4. Second heater 401. Frame 5. Column 501. Horizontal bar 502. Vertical bar 503. Iron nail 504. Second tarpaulin 6. First thermometer 7. Second thermometer 8. Concrete 9.

[0035] Preferably, the frame 5, uprights 501, horizontal bars 502, and vertical bars 503 are all made of wood. The length of the nails 504 is greater than the cross-sectional dimensions of the uprights 501, horizontal bars 502, and vertical bars 503. The uprights 501, horizontal bars 502, and vertical bars 503 can be fixed together with a hammer and multiple nails 504. Wood has good heat insulation properties, preventing the heated air inside the frame 5 from transferring heat to the uprights 501, horizontal bars 502, and vertical bars 503 through the second tarpaulin 6, thus preventing heat loss.

[0036] Preferably, film 1 is a plastic film.

[0037] Preferably, the insulation layer 3 is a cotton quilt, which is purchased from the Aobes Geotechnical Materials store. The model is: Engineering Fabric Thickened Concrete Curing and Moisturizing Cotton Felt.

[0038] Preferably, the heater 4 is the same as the second heater 401; it is purchased from Wenzhou Baojie Electric Appliance Co., Ltd., model BJ-90F, and its related power supply and circuit.

[0039] Preferably, the first tarpaulin 2 and the second tarpaulin 6 are the same; both are made of polyethylene and are used for waterproofing.

[0040] The second tarpaulin, No. 6, was purchased from the Bamia flagship store. Item number: striped tarpaulin.

[0041] The double-sided tape was purchased from Deli Baishun Dahai Specialty Store, model: DL6640.

[0042] Preferably, the first thermometer 7 and the second thermometer 8 are identical, both purchased from Shenyang Weien Electronics Technology Co., Ltd., model NT59-LE-B, along with their associated power supply and circuitry. The computer is purchased from Lenovo, model Tianyi 510pro, along with its associated power supply and circuitry.

[0043] The heater 4, the second heater 401, the first thermometer 7, the second thermometer 8, and the computer are all powered by an external power source or batteries. These instruments are prior art and will not be described in detail in this application. The model numbers selected in this patent are for illustrative purposes only and are not intended to restrict the use of specific instrument models. Detailed Implementation

[0044] It should be understood that the terms "upper side," "above," "adjacent," "both sides," "inside," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Unless otherwise specified, the fixed connections described in this application are all implemented using conventional methods.

[0045] Furthermore, the description of this invention is merely a preferred embodiment and is not intended to limit the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

[0046] Example 1

[0047] The present invention will be further described in detail below with reference to the accompanying drawings: Figures 1-4 As shown, an active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo includes a film 1, a first tarpaulin 2 fixedly connected to the upper side of the film 1, an insulation layer 3 fixedly connected to the first tarpaulin 2, and a frame 5 fixedly connected to the insulation layer 3.

[0048] The frame 5 is provided with multiple columns 501. Each column 501 is fixedly connected to a horizontal bar 502 by several iron nails 504. The horizontal bar 502 is fixedly connected to a vertical bar 503 by several iron nails 504.

[0049] Multiple first heaters 4 and multiple second heaters 401 are fixedly installed on the insulation layer 3. The air outlets of the first heaters 4 at the four adjacent corners of the insulation layer 3 are placed vertically. The air outlets of the multiple second heaters 401 on both sides of the middle of the insulation layer 3 are set in the direction of the airflow according to the air outlet direction of the first heaters 4.

[0050] The frame 5 contains multiple first thermometers 7, which detect the air temperature inside the frame 5 on one side of the insulation layer 3.

[0051] The bottom of the membrane 1 is covered on the sealed concrete 9, and multiple second thermometers 8 are embedded in the concrete 9 to detect the temperature inside the concrete 9.

[0052] The outer side of frame 5 is fixedly covered with a second tarpaulin 6.

[0053] The second tarpaulin 6 is made of polyethylene and is used for waterproofing.

[0054] Frame 5 is made of wood.

[0055] The bottom edge of the second tarpaulin 6 is fixedly and sealed to the bottom edge of the first tarpaulin 2, so that the second tarpaulin 6 and the first tarpaulin 2 form a closed space to prevent moisture from entering the insulation layer 3.

[0056] Preferably, double-sided adhesive is used to seal and bond the tarpaulin. This makes it easy to peel off after use without damaging the bond between the second tarpaulin 6 and the first tarpaulin 2.

[0057] Preferably, after the first heater 4 blows out airflow from the four adjacent corners of the insulation layer 3, it can cause airflow circulation inside the frame 5, and evenly heat all parts inside the frame 5. The second heater 401 enhances the even heating of the air in the middle part inside the frame 5.

[0058] The film 1 is closely attached to the surface of the large-volume concrete 9, the first tarpaulin 2 is covered on the film 1, and the insulation layer 3 is covered on the first tarpaulin 2.

[0059] The heaters 4 are evenly distributed near the four corners of the insulation layer 3, inside the space of the frame 5. The frame 5 is fixedly connected to the insulation layer 3.

[0060] The second tarpaulin 6 is placed over the frame 5, and then fixed and glued after wrapping the frame 5.

[0061] A combined active-passive thermal insulation device for the surface of a large-volume concrete pouring trough, the specific implementation steps of which are as follows:

[0062] A thin film 1 is laid on the surface of the poured wet concrete 9. During the laying process, the air between the film 1 and the surface of the concrete 9 is removed so that the film 1 is tightly attached to the surface of the concrete 9.

[0063] Lay the first tarpaulin 2 on the film 1, ensuring that the first tarpaulin 2 covers the entire area and fixes the edges.

[0064] Lay out insulation layer 3, and lay it flat.

[0065] Multiple first air heaters 4 and second air heaters 401 are placed on top of the insulation layer 3, and the first air heaters 4 and second air heaters 401 are evenly distributed inside the pouring chamber.

[0066] A wooden frame 5 is constructed using uprights 501, horizontal bars 502, and vertical bars 503. The uprights 501, horizontal bars 502, and vertical bars 503 are connected by nails. The dimensions of the frame 5 are determined based on the size of the concrete 9 and the location of the heater to ensure the stability of the frame 5.

[0067] The frame 5 is covered with a first tarpaulin 2, and the edges are sealed to prevent heat loss and rainwater intrusion.

[0068] The first thermometer 7 and the second thermometer 8 transmit the real-time temperature back to the computer.

[0069] Each of the first thermometer 7 and the second thermometer 8 is wirelessly connected to the computer, transmitting temperature data back to the staff at the computer terminal. The staff at the terminal then turn the heater 4 and the second heater 401 on or off based on the temperature difference.

[0070] Based on the temperature feedback from multiple second thermometers 8, adjust the hot air blowing duration of the first heater 4 and the second heater 401 to keep the average temperature difference between the internal air of the frame 5 and the average temperature difference between the concrete 9 not exceeding 20℃. Calculate the temperature difference between the average internal air temperature of the frame 5 and the average temperature of the concrete 9 by using the average temperature of multiple first thermometers 7 and multiple second thermometers 8 inside the frame 5.

[0071] The installation method of the first heater 4 and the second heater 401 in this patent is only a preferred embodiment, and is not a restriction that the first heater 4 and the second heater 401 must adopt this installation method.

Claims

1. A combined active-passive thermal insulation device for the surface of a large-volume concrete pouring silo, comprising a film (1), characterized in that, The first oilcloth (2) is fixedly connected to the upper side of the film (1), the heat insulation layer (3) is fixedly connected to the first oilcloth (2), and the frame (5) is fixedly connected to the heat insulation layer (3).

2. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 1, characterized in that, The frame (5) is provided with multiple columns (501), each column (501) is fixedly connected to a horizontal bar (502) by several iron nails (504), and the horizontal bar (502) is fixedly connected to a vertical bar (503) by several iron nails (504).

3. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 1, characterized in that, Multiple first heaters (4) and multiple second heaters (401) are fixedly installed on the insulation layer (3). The air outlets of the first heaters (4) at the four adjacent corners of the insulation layer (3) are placed vertically. The air outlets of the multiple second heaters (401) on both sides of the middle of the insulation layer (3) are set in the direction of the airflow according to the air outlet direction of the first heaters (4).

4. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 1, characterized in that, The frame (5) is equipped with multiple first thermometers (7), which detect the air temperature inside the frame (5) on one side of the insulation layer (3).

5. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 1, characterized in that, The bottom of the film (1) is covered on the sealed concrete (9), and multiple second thermometers (8) are embedded in the concrete (9). The second thermometers (8) detect the temperature inside the concrete (9).

6. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 1, characterized in that, The outer side of the frame (5) is fixedly covered with a second tarpaulin (6).

7. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 6, characterized in that, The second tarpaulin (6) is made of polyethylene and is used for waterproofing.

8. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 1, characterized in that, The frame (5) is made of wood.

9. The active-passive combined thermal insulation device for the surface of a large-volume concrete pouring silo according to claim 6, characterized in that, The bottom edge of the second oilcloth (6) is fixedly and sealed to the bottom edge of the first oilcloth (2), and the second oilcloth (6) and the first oilcloth (2) form a closed space to prevent moisture from entering the insulation layer (3).

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